The 30-year-old former student pulled the fire alarm in Tower 1 early Monday, as part of a plan to attack fellow students.

The checklist showed the steps Seevakumaran was going to take before carrying out the attack, and he checked each thing off the list when it was complete.

UCF spokesman Grant Heston confirms they are taking a detailed look inside the gunman's computer taken from the dorm room where he shot himself in hopes of finding a video message.

"I think the prevailing belief is there was an attempt to upload something to YouTube," said Heston. "I can tell you were are going to exhaust every option to understand why this happened."

Portions of the note are illegible, but part of it says the following:11:15 head to Madhatter11:30 to before (1:30) get drunk1:30 leave and head back / get bags2:00 Take shower2:30 prepare2:55 put up YouTube, etc.3:00 pull alarm3:05 "good luck and give them hell!"

A medical examiner's spokeswoman confirms an autopsy completed on Seevakumaran's body on Tuesday confirms he died of a single self-inflicted gunshot wound to the head.

The FBI is analyzing the contents of four bottles of liquid, believed to be improvised explosives, found in the gunman's backpack.

One of Seevukumaran's roommates who would have been in the apartment that night was in Maryland celebrating his father's birthday. His family got a call from law enforcement an hour after the incident took place.

"When I first heard about it I was just so shocked. I was really shocked," said Chris Folk. "My heart dropped to my stomach. I didn't think anything like this could happen."

Folk said his roommate never spoke to them, never showed any indication he was stockpiling ammunition or that he was no longer enrolled in school.

"We tried talking to him," said Folk. "He never really wanted to talk to us. At some point I just got the hint that maybe he is just like a student who just wants to be quiet go to school get his degree and get on with life."

But Folk admits he is haunted by the thought of what his roommate could have done.

"I really don't think he had the capacity at all," said Folk. "All I've been thinking about lately is what could have been."

Folk said he didn't know Seevakumaran was 30 years old and being kicked out of this dorm.

"We've been really busy which is what we want," said UCF counselor Dr. Teresa Chmelir.

School counselors have been using a 1-year-old counseling dog named Bodhi to help break the ice with students closely affected by Monday's shooting and who might be hesitant to share what they've gone through.

"It's definitely a process for them," said Chmelir. "They went through the initial kind of 'Oh, my gosh this happened to the you know what if. You know, it could have been worse.'"

Counselors said they've seen a dramatic increase in the number of students expressing fear and anxiety, needing reassurance.

Seevakumaran has been described by roommates and his family as a loner, and he planned to carry out the attack alone.

"We found no connections to any group or organization that would’ve showed any involvement in this situation," said Beary.

Police said Seevakumaran had shown anti-social behavior previously, according to those who knew him, but he was never seen by UCF Counseling and Psychological Services and had no student conduct record issues.

He was no longer enrolled as a student at the school and officials said they were in the process of removing him from Tower 1 where he lived with three other roommates

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